JP3131332U - Reinforced structure of light metal wall plate - Google Patents

Abstract

[PROBLEMS] To secure a shear yield load as a thin, lightweight, low shear load wall plate as a vibration-damping type seismic reinforcement wall mainly for existing wooden residential buildings, and to have stable mechanical behavior after yielding. And make it easy to work without damaging the building as much as possible.
A vibration-damping type seismic wall plate for a small-scale building according to the present invention is a paper body having a frame-shaped metal frame 3 composed of a metal band plate on the four sides of the frame and having the same thickness as the frame. , Wood body, rubber body, various foams 5 are inserted, and thin aluminum alloy plates 2 are attached to both front and back surfaces to form a multi-layer light metal flat plate 1. The entire surface is composed of one wall plate or a plurality of sheets. It is attached to the column 6 that is juxtaposed as a wall plate to receive the seismic force as a shearing force acting in parallel and in the opposite direction from the long side frame, so that the stable mechanical behavior can be achieved without lowering the shear strength after yielding. To do.
[Selection] Figure 1

Description

  The present invention is a vibration-damping type wall structure for small-scale buildings, which avoids early shear buckling of light metal plates mainly subjected to shearing force and reduces the shear strength even in large deformation regions after yielding. The present invention relates to a reinforcing wall structure that is intended to increase the plastic deformation capacity of a light metal flat plate.

  The vibration-damping type shear wall structure of the present invention is mainly intended for small buildings, so it is necessary to keep the shear strength per one wall plate low. Considering the use of low aluminum alloys, etc., it is necessary to ensure a shear yield load and obtain stable post-buckling behavior for such a metal material with low rigidity and strength.

    As a wall plate that satisfies the shear strength required as a wall plate and the yield strength after yielding stably changes, a metal plate provided with many small holes or a plurality of slits in parallel, Reinforced wall structure with a vibration-absorbing function by providing a deformation absorbing layer in the peripheral gap between the wallboard and the building frame, and a reinforced wall structure for the purpose of vibration suppression or earthquake resistance by devising the mounting method between the wallboard and the building frame Etc.

In addition, some seismic reinforcement walls for small-scale buildings such as wooden houses use light metal materials to keep the shear strength low. Damping is made of wall panels and seismic isolation materials made of aluminum foam. For example, there is a reinforcing wall or the like in which aluminum plate corrugated plates are stacked in layers.
Japanese Patent Laid-Open No. 11-247351 Japanese Patent Application Laid-Open No. 2002-67217 Japanese Patent Laid-Open No. 2002-235379 Japanese Patent Laid-Open No. 2003-314083 Japanese Patent Application Laid-Open No. 2004-124605

  The problem to be solved is that early shear buckling occurs by reducing the plate thickness as much as possible to a flat metal plate that receives a shearing force in a plane and using an aluminum alloy material with low rigidity and strength. It is to provide a lightweight and inexpensive seismic reinforcement wall for small-scale buildings with a simple and effective reinforcement structure by preventing the decrease of the shear strength after yielding by preventing the decrease of the yield strength.

  The present invention mainly provides a frame-like frame composed of metal band plates on the four sides around the reinforcing wall plate that receives shearing force, and has a paper material with the same thickness as the frame. A wood body, rubber body, and various foams are arranged, and a light metal thin plate is attached to the front and back surfaces to form a multilayer metal plate. The thin light metal plate on the front and back surfaces has stable mechanical behavior against shear load. I have to.

  The reinforced light metal wall plate of the present invention has stable mechanical behavior even for light metal materials with extremely thin plate thickness and low rigidity, because the flat metal plates on the front and back surfaces restrain deformation from each other. It is effective as a vibration control or seismic reinforcement wall for small and medium buildings without processing. In addition, the materials inserted into the peripheral frame can be made of materials with low rigidity and strength that are generally used. The wallboard is thin and lightweight, and is easy to handle in the construction of small buildings.

  The reinforced wall structure of the present invention is a multi-layer light metal flat plate, so that the thin metal flat plate on the front and back surfaces is buckled and stiffened by the internal insertion material to increase the shear buckling load. Rigidity is greatly increased as a flat plate composed of a strip and a metal plate on the front and back surfaces, and the shear strength can be stably maintained after yielding.

  As an example of a reinforced light metal wall plate of the present invention, FIG. 1 shows an example of a typical form, but a frame-shaped metal frame 3 is provided on the four sides around a rectangular metal flat plate, and the metal band plate is provided with a width. If necessary, one or a plurality of strips 4 are arranged inside and subdivided, and further, a paper material, a wood material, a rubber material, and various foamed materials 5 are inserted in substantially the entire space in the frame. An intermediate layer is formed, and thin light metal flat plates 2 are attached to both front and back surfaces to form a multilayer light metal flat plate.

  The reinforced light metal wall plate of the present invention is considered to be mainly for seismic reinforcement of existing wooden houses. As shown in Fig. 1, it is fixed to the surface of the parallel pillars 6 with screws, nails, etc. It is designed so that it does not break the surrounding building parts when installing the wallboard by fitting it between the floor. (A) The whole surface shown in the figure may be constituted by a single wall plate 1, and (b) the two wall plates 1 may be arranged vertically as shown in the figure.

  FIG. 2 is an explanatory diagram for confirming the mechanical performance of the reinforced light metal wall plate, in which a wall plate having a size of 1,620 mm × 900 mm is applied with a shearing force parallel to the left and right frames and in the upside down direction. (A) The figure is composed only of the peripheral frame, and the deformation of the frame material in the upper and lower short side direction out of the plane is not constrained. ) The figure shows a case where two strips of 75 mm × 8 mm are further arranged at approximately equal intervals inside the framework.

FIG. 3 shows that the above-mentioned multilayer light metal flat plate requires a shear strength Q per wall of 10 to 15 kN, so that the thin plate on the front and back surfaces is a 1050-O material having a thickness of 0.3 mm, and the peripheral frame material is 6063- T6 material. (A) In the example shown in the figure, the analysis result when the Young's modulus E of the internal filler is 3 kN / cm ² is indicated by ○ and ●, and there is a difference in yield strength depending on the width of the short side frame. The analysis results in the case where there is □ are marked with □ and ■, and by subdividing the flat plate, it is stable even if the Young's modulus E of the filler is as low as 0.5 kN / cm ² .

  FIG. 4 shows the growth of bending deformation out of the plane of the wall plate in the large deformation region after the shear yielding for the analysis result. (A) The influence of the width of the short side direction frame material in FIG. However, in the case where the reinforcing material is arranged in the middle part of FIG. 5B, the growth of deformation is slower and smaller than the former, and the stiffening effect is obtained even if the rigidity of the filler is lowered. Delaying the growth of these out-of-plane deformations is extremely important for stabilizing the restoring force characteristics under the shear force applied to the positive and negative alternation caused by the earthquake.

  FIG. 5 shows a case where two light metal flat plates are used as one wall plate and a case where a single flat plate having a height of 1/2 is used alone, and both have substantially the same shear strength. I think so. (A) The two wall plates shown in the figure have a peripheral band plate 3 of 75 mm × 8 mm, the front and back plates have a thickness of 0.2 mm, and (b) the wall plate having a size 1/2 in the figure is used alone and In order to make it the same as the shear strength, one is the same frame material 3 and the front and back plate thickness is 0.6 mm, and the other is the frame material 3 is 90 mm × 8 mm and the front and back plate thickness is 0.5 mm.

  FIG. 6 shows a case where the wall plate that fits between the ceiling surface and the floor surface is composed of two sheets of 810 mm × 900 mm and is joined at a plurality of positions at the aa position. The case where the frame width is wide is indicated by ●, and the case where the frame width is the same is indicated by ○. However, the wall plate in which the former two sheets are arranged one above the other is also used when the latter is used alone. There is a big difference in the behavior that accompanies yielding, and what should be noted is the effect on the building pillar of the other side to which this wallboard is attached. The material of this analysis example is the same as the above example.

Fig. 7 shows that the shear strength required for seismic reinforcement walls of small-scale buildings such as wooden houses is extremely low, and the non-heat treated aluminum alloy that is a stress-strain relationship of round house type nonlinearity close to pure aluminum metal is optimal. it is conceivable that. FIG. 12 shows the stress-strain relationship of an aluminum alloy material in comparison with an aluminum alloy that is a structural material. The elastic Young's modulus of each material is in a range of approximately E = 6000 to 7500 kN / cm ² . The material highlighted by the solid line is the material selected in this analysis, and is actually the recommended combination.

  The reinforcing wall structure of the present invention by a thin light metal flat plate subjected to a shearing force is arranged in a frame shape around the four sides of a rectangular flat plate, and a paper body, a wooden body, a rubber body, and various foams are arranged therein, A light metal flat plate is attached to both front and back surfaces to form a multilayer light metal flat plate. The light metal flat plate with thin front and back does not need to be specially processed or special metal material, and the material constituting the intermediate layer is It is generally used frequently and can be easily and inexpensively procured.

  According to the reinforcing structure of the present invention, a shear buckling load can be increased for a light metal flat plate that is extremely thin and has low rigidity and strength, and a large deformation region after yielding is obtained by a simple configuration that simply provides a frame frame around the periphery. In this case, since it is possible to avoid a decrease in shear strength, it is effective as a structural wall for vibration control or earthquake resistance for small buildings and is widely used.

  The vibration-damping light metal wall plate of the present invention is considered to be installed on a column surface that is parallel between the ceiling surface and floor surface of the building in seismic reinforcement work, so that construction without breaking the periphery of the reinforcement point This makes it possible to check the location of the building, making it easy to check after construction, and is ideal for ensuring safety. In addition, if a plurality of wall plates are used, it is easy to handle from the production, transportation and construction of the wall plates, which is considered optimal for seismic reinforcement of existing wooden buildings.

It is the figure which showed the structural details of the light metal wall board of this invention, and how to attach to a building. It is explanatory drawing of the periphery framework and shearing force of this light metal wall board. Example 1 It is an analysis result figure which verified the effect of the peripheral part frame material and internal reinforcement material of this wall board. It is an analysis result figure of an out-of-plane deformation of a wall board in connection with stabilization of repeated history behavior. It is explanatory drawing of the shearing force of this wall board comprised with multiple sheets. (Example 2) It is an analysis result figure for verifying this wall board constituted by a plurality of sheets. It is a stress-strain relationship figure of the aluminum alloy material which comprises this light metal wall board.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Multi-layer metal flat plate which receives shear force 2 Metal flat plate which comprises both front and back 3 Peripheral frame which consists of strips, etc. 4 Internal reinforcement material which consists of strips, etc. 5 Flat plate element inserted in the middle layer 6 Column of wooden building・ Beam structure axis

Claims (2)

  As a vibration-damping type seismic wall for small buildings, a frame-shaped frame is formed on the four sides of the frame to give a width to the metal band, and if necessary, one or more band plate reinforcements are also provided inside the frame. A multi-layered metal flat plate with an aluminum alloy thin plate having a round house type non-linear stress-strain relationship and a tensile strength of 10 kN or less on both sides of the front and back surfaces. Paper, wood, rubber, and various foams of the same thickness as the frame are placed so that the front and back light metal flat plates constrain deformation, and the shear strength is maintained in the large deformation region after yielding without reduction. Multi-layer light metal flat plate made to be able to   As a vibration-damping wall plate for small buildings, the entire surface with a standard size of approximately 1,800 mm x 900 mm or less is divided into one wall plate or a plurality of layers and arranged in layers, continuously or intermittently at the contact site The multi-layered light metal flat plate according to claim 1, wherein the wall plate is integrally joined and integrated, and the wall plate is approximately ½ of the size. A vibration-damping type seismic reinforcement wall that receives shearing forces acting in parallel and in opposite directions from both side frames in the side direction, and does not break the top and bottom ceilings and floors during construction and facilitates inspection after reinforcement.

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